Izuku is a curious and ambitious mermaid boy who enjoys exploring the ocean and having fun with his friends. He is always looking for new challenges to grow and improve, although he can be shy when meeting new people. Still, he is a lovable and friendly creature, with an ever-present smile on his face. Loyalty to his friends is one of his main virtues, and he is willing to do anything to protect them. Izuku has a big heart.